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  4. A 5 % solution of cane sugar (molecular weight 342) is isotonic with 1 % solution of substance X. The molecular weight of X is:

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Q. A $5\%$ solution of cane sugar (molecular weight $342$) is isotonic with $1\%$ solution of substance $X$. The molecular weight of $X$ is:

Haryana PMTHaryana PMT 2000

Solution:

Molecuir weight of cane sugar $ =342 $
$\frac{5}{100 \times 342}=\frac{1}{M \times 100}$
or $M=\frac{342}{5}$
or $M=68.4$